0 Occurrences 0 Occurrences 1 Occurrences 11 Occurrences 
East Twin Creek 2 Location
City, County, and State of the levee system. Determined by the levee alignment location not the leveed area.
San Bernardino, San Bernardino County, California
System ID
Unique identifier code for the levee system using 10 or 12 numbers in length.
3805010079
Operation and Maintenance Organization
Entity responsible for day-to-day management of the levee.
SBCFCD
Floodplain Management
Entities responsible for regulating activities that occur in areas prone to flooding.
FEMA Region 9
Oversight Organization
Entity responsible for oversight of the levee and ensuring it is maintained.
USACE - Los Angeles District
Last Assesment Date Last Risk Assessment or Formal Inspection.
8/5/2019
Data Last Updated Date any of this information for the system has been updated.
10/24/2024
Levee Length
Combine length of all the levee system features including the embankments, floodwalls, closures where they exist for this system.
1.661 Miles Average Levee Height
The average height of the levee system. The levee profile viewer on the mapping window will show the actual levee height values for the length of the levee if available.
20 Feet Year Levee Constructed Year levee system was fully completed as a flood reduction project.
1961 Summary
General text description of the levee system with a summary of why the levee is there, and the benefits it provides.
East Twin Creek 2 Levee System is located in the City of San Bernardino, in the County of San Bernardino, in the State of California. East Twin Creek 2 Levee System is located along the left/east bank of East Twin Creek. East Twin Creek 2 Levee System originally constructed by local interests but later improved by the United States Army Corps of Engineers (USACE). The East Twin Creek 2 Levee System levee embankment extends from approximately 3,074 feet upstream of 40th Street to the East Twin Creek Channel inlet structure at Marshall Boulevard, a distance of 8,670 feet. East Twin Creek 2 Levee System also includes a total of 127 feet of channel at its downstream limit along the left/east bank of East Twin Creek Channel. East Twin Creek 2 Levee System is locally operated and maintained by the San Bernardino County Flood Control District.
Performance & Condition
General text description of the historical and anticipated performance of the levee, the people and property benefitting from the levee and who may be at risk of flooding, and actions to address areas of concern.
The following Risk Characterization is a description of risk associated with this levee system. It is currently undergoing review and may be updated in the future.
The LSOG considers the risk associated with East Twin Creek 2 to be low for Prior to Overtopping due to anticipated moderate performance with low associated consequences and also to be Low for Overtopping due to the relatively infrequent likelihood of overtopping and low associated consequences. The levee is expected to perform well under significant loading; however uncertain in performance due to significant amount of unwanted vegetation, unknown condition of the culverts, and unknown condition of bank protection. Embankment seepage concerns are offset by the short loading duration and embankment erosion concerns are somewhat offset by the robust levee section. There is a high level of community awareness and flood warning effectiveness; there is a low potential for loss of life and the potential economic damages are low.
Flooding Hazard
Historic Loading by Percentage of Height
Representative loading associated with historical flood information as a percentage of the levee height or overtopping.
Representative loading associated with historical flood information as a percentage of the levee height or overtopping.
0 Occurrences 0 Occurrences 1 Occurrences 11 Occurrences